Rachel Ceasar, a 29-year-old doctoral candidate in medical anthropology, sat in Sightglass Coffee surrounded almost exclusively by men - many of them staring at MacBook laptops, wearing designer eyeglasses and drinking artisanal coffees - and made a confession. Even here, home turf for San Francisco's tech set - a modern, South of Market coffee shop that lists Twitter and Square co-founder Jack Dorsey as an investor - the tech industry faces a backlash. Local and national media have been filled with stories about longtime residents' simmering resentment about the economic good times squeezing out families, artists and low-wage workers. Crisis consultant Sam Singer said it's clear tech companies have "an image problem," but said they could easily improve their reputation just by better sharing all the positive impacts they are having on San Francisco: the 23,500 jobs they've created since 2009, according to one report; the tax base they have helped shore up; their direct impact on helping the city's unemployment rate shrink to 5.3 percent, the lowest since 2008. Supervisor David Campos, who represents the Mission District, which has become ground zero for discontent over the perceived techie invasion, said he is setting up a meeting between some longtime Mission residents and Facebook to begin a dialogue. Some neighbors say the resentment isn't helped by the fact that they see the tech workers only when they're boarding the private shuttle buses that take them down Highway 101 to Google or Apple, delaying Muni buses and blocking traffic while they're at it. Lee has invited top tech executives to a "private lunch and discussion" to be held Monday on the "emerging challenges in housing, transportation and affordability for our city." "Together we must respond to these challenges to ensure we can sustain our economic recovery and extend this prosperity to all our city's residents and neighborhoods," read the invitation, which listed Salesforce.com and tech investor Ron Conway as co-hosts. Marc Benioff, the founder of Salesforce.com, is widely credited with being the most generous tech titan in San Francisco and has funded a children's hospital, housing for homeless families and computer equipment in public schools. Facebook recently gave laptops to students at two Mission District public schools, Yelp announced $100,000 in grants to local nonprofits, Google helped fund free Wi-Fi in parks, and Zynga has offered mentorship to students at Balboa High. Companies with a payroll of $1 million or more and that seek a city tax break for locating in the historically downtrodden Mid-Market area - Twitter and Zendesk are there - must provide a community benefits package, which may include volunteering, helping nonprofits and purchasing their catering from nearby businesses. For Peter Steinauer, a 43-year-old software engineer who lives in Duboce Triangle, the brouhaha over the divide between longtime residents versus tech workers doesn't ring true.